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A376688
List of palindromic subwords (or palindromic factors) of the Kolakoski sequence (A000002).
1
1, 2, 11, 22, 121, 212, 1221, 2112, 11211, 22122, 121121, 212212, 1221221, 2112112, 12122121, 21211212, 112212211, 221121122, 1121221211, 2212112122, 12211211221, 21122122112, 122121121221, 211212212112, 1211221221121, 2122112112212, 11221211212211
OFFSET
1,2
COMMENTS
Empirically, for any m > 0, there are two m-digit terms, say w1 and w2, and replacing 1's by 2's and 2's by 1's in w1 yields w2.
PROG
(PARI) \\ See Links section.
CROSSREFS
Intersection of A002113 and A376677.
Sequence in context: A118594 A263720 A235609 * A018351 A004642 A346497
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Oct 01 2024
STATUS
approved